Can you identify these dollhouses?

A friend recently acquired some lovely antique dollhouses, but we don't know anything about them. Are they are commercial, or hand made. Are they German? American? British? How old are they?. If you can help identify them please let me know. If not, that's okay too. Thanks for looking.

This one looks like a German house from the early 1900s. Many houses had garages in the 1920s when cars were becoming popular. Could it be a Gottschalk, or an Albin Schonherr? The round bay window is unusual, and it has a small balcony on the upper floor.

This house in Prague has very similar architectural details to the next dollhouse

This house also has a round bay window. It has been heavily restored with new paint and brick paper on the foundation, so it is hard to say what it originally looked like. The side porch and the balcony railing are similar to Gottschalk houses, but the mansard roof is like many Christian Hacker houses. The interior is accessible only by lifting the roof.

This wonderful house has two rooms inside. It looks older then the 2 houses above.

This is the back view

This is the side view.

This unusual house is made to hang on a wall. Doors swing open on the two front sections, but the attic is accessible only from the back where there is a small opening.